Nut-lock.



No- 781,140.-. I

PATENTED JANl'sl, 1905.

F FISHER NUT LOOK.

IWWVIIIIWI UNITED STATES Patented January 31, 1905.

PATENT OFFICE.

FRED FISHER, OF ST." LOUIS, MISSOURI, ASSIGNOR TO JOHN BOLLIN, OF

ST. LOUIS, MISSOURI, AND KENTUCKY.

WILLIAM A. BURGER,/ OF LOUISVILLE,

NUT-LOCK.

SPECIFICATION forming part of Letters Patent N0. 781,140, dated anuary 31, 1905.

Application filed June 13, 1904;. Serial No. 212,331.

T0 ttZZ whom it 171.00g concern:

Be it known that I, FRED FIsHER, acitizen of the United States, residing at St. Louis, State of Missouri, havev invented certain new and useful Improvements in NutLocks, of which the following is a full, clear, and exact de' scription, reference being had to the accoms.

panying drawings, forming a part hereof.

My mventlon has relation to improvements in nut-locks; and it consists in the novel con-- The object of my invention is to construct a nut-lock which will effectively lock the nut against turning after being once screwed to any required position.

In detail the invention may be described as follows:

Referring to the drawings, 1 represents a bolt, and 2 the head thereof. Out from the screw-threaded portion of the bolt is a longitudinal groove or depression 3. In the present instance the outer face of the nut 4 has formed thereon a polygonal shoulder 5, having a number of sides corresponding to the number of sides of the nut, (in the present instance six, though, of course, the nut may be square or four-sided.) Over this shoulder is passed the polygonal blank 6, provided with arms 7 which are subsequently bent upward toward the bolt, Figs. 1, 2, 3, and when the nut has been screwed to the required degree along the threaded portion of the bolt one of the arms 7 is pressed into the groove 3, thereby effectively locking the nut against turning or unscrewing. The number of arms 7 correspond, preferably, to the number of sides of the blank or key 6, so that one arm at least shall always be (upon the turning of the nut through an arc of sixty degrees) opposite the gr0ove'3. To remove the nut, the particular arm 7 which has been forced into the depression 3 can be bent outwardly therefrom,

.when the nut will again be free to turn in either direction. Preferably the arms 7 are disposed between the angles of the blank 6, whereby a comparatively shorter arm is necessary to engage thegroove 3 than would be the case were the arms located at thev angles of the blank.

The blank.6 fits tightly over the shoulder 5 and is frictionally and permanently held thereon, the fit being so close that there is n danger of the blank working off.

I do not, of course, wish to be limited to the precise details here shown, as they may in a measure be departed from without in any wise afiecting the nature or spirit of my invention.

Having described my invention, what I claim 1. The combination with a bolt having a screw threaded portion and a longitudinal groove formed therein, of a nut-lock comprising a nut having a polygonal shoulder formed along the outer face of the same, a blank or key having a polygonal opening adapted to be passed over said shoulder and held friction- 2. The combination with a bolt having a screw-threaded portion and a longitudinal groove formed therein, of a nut-lock comprising a nut having a polygonal shoulder formed thereon, a blank or keyhaving a polygonal opening through which the shoulder may be passed, and having a'serie's of bendable arms radiating from the several sides ofthe blank for engagement with the longitudinal groove aforesaid, substantially as set forth.

In testimony whereof I afiix my signature in presence of two witnesses.

V FRED FISHER. Witnesses:

EMIL STAREK, G. L. BELFRY. 

